Objective To analyze bond strength to bleached enamel following application of 10% sodium ascorbate gel. Material and methods Forty third molars were allocated into five groups (n = 8): GP - unbleached specimens restored with composite resin; GN - specimens restored immediately after bleaching; and G15; G30 and G60 (test groups) - bleached specimens treated with 10% sodium ascorbate gel for 15,...

We investigate the association between business strategy and firm-level tournament incentives in China find that is associated with positively. further this positive relationship manifests itself local, but not central, state-owned enterprises (SOEs). In addition, we also offer some evidence foreign institutional investors play a moderating role on incentives. Our study fills gap existing liter...

Four enteropathogenic Escherichia coli (EPEC) strains belonging to the O55 serogroup (G21 and G30 [both O55:H6], G35 [O55:H-], and G58 [O55:H7]) were tested for their tissue tropism by using human intestinal in vitro organ culture. Strains showed restricted adhesion with attaching-and-effacing activity to follicle-associated epithelium of Peyer's patches, with no apparent adhesion to duodenum o...

Objective To investigate the relationship between abdominal adipose tissue distribution, β-cell function, and insulin sensitivity (IS) in a Chinese population. Methods One hundred and eighty-eight healthy subjects (healthy group), 239 with normal glucose, and 1~4 abnormal metabolic traits (metabolic dysfunction group, MD group) and 125 with hyperglycemia (hyperglycemia group) were studied. HO...

Concrete is the most adaptable, long-lasting, and dependable construction material on planet. There are numerous environmental concerns associated with production of OPC, natural sand becoming more expensive scarce as a result unlawful river dredging. The greatest replacement for traditional concrete geopolymer low calcium fly ash. purpose this paper to investigate mechanical properties grades ...

Type 2 diabetes is characterized by a reduction in both insulin sensitivity and glucose-stimulated insulin secretion (GSIS). Although insulin resistance usually precedes -cell dysfunction, the role of the latter in the development of the disease is unclear. The detrimental effect that chronic hyperglycemia exerts on -cell function is well established and may contribute to further deterioration ...

We measure U.S. publicly traded companies’ exposures to skilled labor risk, i.e., the potential failure in attracting and retaining skilled labor, by the intensity of their discussions on this issue in their 10-K filings. We show that this measure effectively captures firm risk due to the mobility of skilled labor. We find that skilled labor risk is an important determinant of corporate compens...

We study how Chinese private entrepreneurs benefit from participating in politics. Using original hand-collected data on listed firms controlled by private entrepreneurs, we document a significant positive relationship between political participation and change in firm performance. We also provide evidence that the change in social status cannot explain the change in performance. We then identi...

While firm-level capital growth rates exhibit positive spikes, and rise as fast as they fall, the average capital growth rate across firms exhibits negative spikes, and declines faster than it recovers. We develop a dynamic model of investment that reconciles these empirical patterns. The model features costly reversibility, cyclical macroeconomic shocks, and uncertainty about the state of the ...